R134A substitute ?? Help Pls.

[northern-tech]

If a compressor is supposed to run on R134a, is there a substitute refrigerant that will run as well? I have been reading stories of capillary lines plugging, etc, and have realized that some of my problems are with the 134a as well.:rolleyes:

[The MG Pony]

WTF? I am afraid that is impossible, unless you are using the wrong oil or the system has been horribly built.

I can how ever tell you where you can get R-134a in Canada with out a ticket. For the system what you will have to do is ensure it is throughly cleaned inside then use a good quality POE oil and a good quality F/D (Filter/Dryer) If all thees things have been observed then you may have gotten a contaminated refrigerant.

[fatty]

R507 but it will run the compressor hotter due to the increased pressure but it will also give you colder temps

[Andy]

If a compressor is supposed to run on R134a, is there a substitute refrigerant that will run as well? I have been reading stories of capillary lines plugging, etc, and have realized that some of my problems are with the 134a as well.:rolleyes:

Any R12 drop in will work, the ester oil will not be a problem with these.

R401a is the one I have used in the past:)

Kind Regards Andy:)

[frank]

R134a is known for waxing the oil which in turn blocks capillaries. I prefer to use R49.

[northern-tech]

This R49.......is it available in North America, or is it under another name ??
Thanks for the reply guys. Andy, I have used the
R - 414B in the past, so may give this a try in the future.

[John Wood]

R49 is R413a, it is a superb refrigerant.

[donato]

I tried r409a as substitute for r134a in reciprocating compressor at -10 celcius evaporating temp. it still runs well.

[hotrodluvr]

I, too, have experienced many R134a units that have clogged the cap tube. I backflush evap and condensor with liquid R406A through my reclaimer to dissolve the clog and recharge with AB oil and R401A or R401B.